package com.example.demo.conf;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

import javax.sql.DataSource;
import java.sql.SQLException;

/**
 * Description:
 * <p>@author: LUO</p>
 * Date: 2019-05-16 8:12
 **/
@Configuration
@Slf4j
public class DruidConfig {
    /**
     * 数据库前缀.
     */
    private static final String DB_PREFIX = "spring.datasource";

    /**
     * @return ServletRegistrationBean
     */
    @Bean
    public ServletRegistrationBean<StatViewServlet> druidServlet() {
        log.info("init Druid Servlet Configuration ");
        ServletRegistrationBean<StatViewServlet> servletRegistrationBean =
                new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");

        /*  // IP白名单
        servletRegistrationBean.addInitParameter(
                      "allow", "192.168.2.25,127.0.0.1");
        // IP黑名单(共同存在时，deny优先于allow)
        servletRegistrationBean.addInitParameter("deny", "192.168.1.100");*/

        //控制台管理用户
        servletRegistrationBean.addInitParameter("loginUsername", "admin");
        servletRegistrationBean.addInitParameter("loginPassword", "pj_@druidAdmin");
        //是否能够重置数据 禁用HTML页面上的“Reset All”功能
        servletRegistrationBean.addInitParameter("resetEnable", "true");
        return servletRegistrationBean;
    }

    /**
     * @return FilterRegistrationBean
     */
    @Bean
    public FilterRegistrationBean<WebStatFilter> filterRegistrationBean() {
        FilterRegistrationBean<WebStatFilter> filterRegistrationBean = new FilterRegistrationBean<>(new WebStatFilter());
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }

    @ConfigurationProperties(prefix = DB_PREFIX)
    @Data
    static class IDataSourceProperties {

        private String url;

        private String username;

        private String password;

        private String driverClassName;

        private int initialSize;

        private int minIdle;

        private int maxActive;

        private int maxWait;

        private int timeBetweenEvictionRunsMillis;

        private int minEvictableIdleTimeMillis;

        private String validationQuery;

        private boolean testWhileIdle;

        private boolean testOnBorrow;

        private boolean testOnReturn;

        private boolean poolPreparedStatements;

        private int maxPoolPreparedStatementPerConnectionSize;

        private String filters;

        private String connectionProperties;


        @Bean //声明其为Bean实例
        @Primary //在同样的DataSource中，首先使用被标注的DataSource
        public DataSource dataSource() {
            DruidDataSource datasource = new DruidDataSource();
            datasource.setUrl(url);
            datasource.setUsername(username);
            datasource.setPassword(password);
            datasource.setDriverClassName(driverClassName);

            //configuration
            datasource.setInitialSize(initialSize);
            datasource.setMinIdle(minIdle);
            datasource.setMaxActive(maxActive);
            datasource.setMaxWait(maxWait);
            datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
            datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
            datasource.setValidationQuery(validationQuery);
            datasource.setTestWhileIdle(testWhileIdle);
            datasource.setTestOnBorrow(testOnBorrow);
            datasource.setTestOnReturn(testOnReturn);
            datasource.setPoolPreparedStatements(poolPreparedStatements);
            datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
            try {
                datasource.setFilters(filters);
            } catch (SQLException e) {
                log.error("error={}","druid 初始化过滤器配置失败");
                log.error("详细信息={}",e);
            }
            datasource.setConnectionProperties(connectionProperties);
            return datasource;
        }
    }
}

